Update max tokens

GPTHelper.py

@@ -46,8 +46,8 @@ def gpt35_check_fact(evidence, fact):
         response = openai.Completion.create(
           model="text-davinci-003",
           prompt=prompt,
-          max_tokens=2,  # Don't need more for true/false/undetermined
-          temperature=0
+          max_tokens=3,  # Don't need more for Entails/Contradicts/Undetermined
+          temperature=0  # Higher temperature would not increase prediction accuracy.
         )
         response = response['choices'][0]['text'].strip()
         response = response.replace('.', '')